#include <stdio.h>
int main()
{
    char grade;
    scanf("%c",&grade);
    printf("your score:");
    switch(grade)
    {
    	case'A':printf("85~100\n");break; 
    	case'B':printf("70~84\n");break;
    	case'C':printf("60~69\n");break;
    	case'D':printf("<60\n");break;
    	default:printf("enter data error!\n");
	}
	return 0;
 } 
